奥特曼 发表于 2019-12-25 09:47:19

《粉体工程》武汉理工大学20春作业二

粉体工程_作业二
1.[多选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">若已知粉体层中某处的最大主应力</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="26" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311517.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">和最小主应力</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="31" height="32" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311524.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">,则该位置的压应力和剪应力关系,可通过在</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="55" height="25" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311545.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">坐标中作出相应的莫尔圆给出。莫尔圆的圆心坐标为:_______;半径为:_______。</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

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    A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="137" height="67" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311593.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="134" height="67" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311596.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="124" height="43" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311599.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="77" height="60" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311602.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    E.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="80" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311605.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    F.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="96" height="36" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311608.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    正确答案:——BD——
2.[多选题] <p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">某一粉体粒度分布符合正态分布,其频度分布函数为:</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="215" height="58" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110512.png"></span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">,则其平均粒径</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="33" height="22" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110520.png"></span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">______;标准偏差</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="28" height="18" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110532.png"></span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">______。</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span>

    A.<p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="38" height="30" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110542.png"></span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p>      </o:p></span>

    B.<p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="27" height="23" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110545.png"></span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p>      </o:p></span>

    C.<p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="35" height="23" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110548.png"></span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p>      </o:p></span>

    D.<p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="48" height="49" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110551.png"></span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p>      </o:p></span>

    E.<p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="97" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110554.png"></span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p>      </o:p></span>

    F.<p class="MsoNormal" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="88" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc01.files/ftkxygc0110557.png"></span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p>      </o:p></span>

    正确答案:——BF——
3.[多选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">在极限应力状态下,测得某粉体压应力</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="26" height="26" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0310965.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">和剪应力</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="18" height="19" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0310970.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">符合线性关系:</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="198" height="39" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0310978.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">,则该粉体的内摩擦角</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="45" height="36" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0310989.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">_______,表观抗张强度</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="51" height="33" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311004.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">_______</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="52" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311036.png"></span>。<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.30º
    B.45º
    C.60º
    D.1.0
    E.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="48" height="48" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311061.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    F.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><img width="72" height="36" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc03.files/ftkxygc0311064.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    正确答案:——CF——
4.[多选题] 介质磨剥类超细粉碎设备可选择进行的操作工艺(可多选):______。
    A.干法
    B.湿法
    C.连续
    D.间歇
    正确答案:————
5.[判断题] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan"><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">粉体层极限应力状态下的压应力<span lang="EN-US">   <!--><v:shape   id="图片_x0020_39" o:spid="_x0000_i1043" type="#_x0000_t75" style='width:12.6pt;   height:17.4pt;mso-wrap-style:square;mso-position-horizontal-relative:page;   mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image017.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc02.files/ftkxygc022460.png"/></v:shape><!-->   <!----><img width="17" height="23" v:shapes="图片_x0020_39" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image017.png">   <!----></span>与剪应力<span lang="EN-US">   <!--><v:shape id="图片_x0020_40" o:spid="_x0000_i1044"   type="#_x0000_t75" style='width:12.6pt;height:15pt;mso-wrap-style:square;   mso-position-horizontal-relative:page;mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image019.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc02.files/ftkxygc022465.png"/></v:shape><!-->   <!----><img width="17" height="20" v:shapes="图片_x0020_40" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image019.png">   <!----></span>之间的变化关系,可通过<span lang="EN-US">Jenike</span>剪切法实验或三轴压缩法实验获得。</span><span lang="EN-US" style="font-size:12.0pt;mso-font-kerning:0pt"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
6.[判断题] 细颗粒回收率是指:实际回收到细粉组中的细颗粒与原料中细颗粒   的质量之比。
    A.正确
    B.错误
    正确答案:————
7.[判断题] 物料干燥过程的三个阶段是指:加热阶段、等速干燥阶段和降速干燥阶段。
    A.正确
    B.错误
    正确答案:————
8.[判断题] <p class="MsoNormal" align="left" style="margin-top:7.8pt;mso-para-margin-top:.5gd;text-align:left;mso-pagination:widow-orphan"><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">分级精度不完全度指数:<span lang="EN-US">   <!--><v:shape   id="图片_x0020_51" o:spid="_x0000_i1049" type="#_x0000_t75" style='width:228pt;   height:36pt;mso-wrap-style:square;mso-position-horizontal-relative:page;   mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image024.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc02.files/ftkxygc025516.png"/></v:shape><!-->   <!----><img width="304" height="48" v:shapes="图片_x0020_51" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image024.png">   <!----></span>中的<span lang="EN-US">   <!--><v:shape id="图片_x0020_52" o:spid="_x0000_i1050"   type="#_x0000_t75" style='width:33.6pt;height:33.6pt;mso-wrap-style:square;   mso-position-horizontal-relative:page;mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image025.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc02.files/ftkxygc025519.png"/></v:shape><!-->   <!----><img width="45" height="45" v:shapes="图片_x0020_52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image025.png">   <!----></span>,表示的是<span lang="EN-US">A</span>:部分分级效率为<span lang="EN-US">50%</span>所对应的粒径值,还是表示<span lang="EN-US">B</span>:通过率为<span lang="EN-US">50%</span>所对应的粒径值?<span lang="EN-US">A</span>是正确的。</span><span lang="EN-US" style="font-size:12.0pt;mso-font-kerning:0pt"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
9.[判断题] 按粉磨机械的施力方式可分为:料床挤压类磨机、机械冲击类磨机和研磨介质类磨机。
    A.正确
    B.错误
    正确答案:————
10.[判断题] <p class="MsoNormal" align="left" style="text-align:left;">      <span style="font-size:12.0pt;font-family:Microsoft Yahei;color:black;">粉体的流动函数<span>FF</span>被定义为:粉体密实所施加的最大主应力<span> <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191204/20191204171941_17.png" alt="" /></span>与粉体的开放屈服强度<span> <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191204/20191204172035_834.png" alt="" /></span>之比,则<span>FF</span>值越小,相应粉体的流动性就会越差。</span><span style="font-size:12.0pt;"> </span>

    A.正确
    B.错误
    正确答案:————
11.[判断题] 过滤是固液分离的第一步,浓缩是固液分离的第二步。
    A.正确
    B.错误
    正确答案:————
12.[判断题] 滤饼过滤的基本类型包括:加压过滤、压榨过滤、离心过滤和真空过滤。
    A.正确
    B.错误
    正确答案:————
13.[判断题] <p class="MsoNormal" align="left" style="text-align:left;">      <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191204/20191204171125_687.png" alt="" />

    A.正确
    B.错误
    正确答案:————
14.[判断题] <p class="MsoNormal" align="left" style="margin-top:7.8pt;mso-para-margin-top:.5gd;text-align:left;mso-pagination:widow-orphan"><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">若颗粒群的频度分布函数为:<span lang="EN-US">   <!--><v:shape   id="图片_x0020_82" o:spid="_x0000_i1065" type="#_x0000_t75" style='width:303.6pt;   height:66pt;mso-wrap-style:square;mso-position-horizontal-relative:page;   mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image039.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc04.files/ftkxygc041443.png"/></v:shape><!-->   <!----><img width="405" height="88" v:shapes="图片_x0020_82" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image039.png">   <!----></span>,则其粒度分布符合对数正态分布。</span><span lang="EN-US" style="font-size:12.0pt;mso-font-kerning:0pt"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
15.[判断题] 理论和实验均表明,粉碎的能量效率随着施载强度的增加而降低。
    A.正确
    B.错误
    正确答案:————
16.[判断题] 国内目前采用的斗式提升机主要类型分为:环链式、板链式和带式。
    A.正确
    B.错误
    正确答案:————
17.[判断题] 颗粒在液体中的分散原则是,极性表面颗粒易于在非极性液体中分散。
    A.正确
    B.错误
    正确答案:————
18.[判断题] 国内目前采用的斗式提升机主要类型分为:带式、环链式和板链式。
    A.正确
    B.错误
    正确答案:————
19.[判断题] 表征颗粒几何形状的形状因子分为:形状指数和形状系数。
    A.正确
    B.错误
    正确答案:————
20.[判断题] 对分级机的分级效果进行评价的指标有:细颗粒及粗颗粒回收率;综合分级效率(Newton分级效率);_______。
    A.正确
    B.错误
    正确答案:————
21.[判断题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">若细颗粒回收率为</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;"><img width="26" height="32" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc06.files/ftkxygc0613877.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">,粗颗粒回收率为</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;"><img width="22" height="32" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc06.files/ftkxygc0613886.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">,则综合分级效率(</span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">Newton</span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">分级效率)</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;"><img width="32" height="31" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc06.files/ftkxygc0613907.png"></span><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">的计算式为:</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;"><img width="140" height="36" src="http://wljy.whut.edu.cn:80/uploadfiles/word/ftkxygc06.files/ftkxygc0613914.png"></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;">。</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:0.0000pt;"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
22.[判断题] <p class="MsoNormal" align="left" style="text-align:left;">      <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191204/20191204171315_190.png" alt="" />

    A.正确
    B.错误
    正确答案:————
23.[判断题] 在极限应力状态下,测得某一粉体层压应力σ与剪应力τ的关系符合线性方程:τ=σ(KPa)。则该粉体层内摩擦角为45o,内聚力为0。
    A.正确
    B.错误
    正确答案:————
24.[判断题] 两个平均粒度相等的颗粒群,其粒度分布完是相同的。
    A.正确
    B.错误
    正确答案:————
25.[判断题] 粉碎的主要施力方式可分为压碎、磨剥、弯折、劈碎和击碎。
    A.正确
    B.错误
    正确答案:————
26.[判断题] 辊压机与球磨机组成的粉磨系统形式有:预粉磨系统、半终粉磨系统、终粉磨系统和联合粉磨系统。
    A.正确
    B.错误
    正确答案:————
27.[判断题] 粉体的摩擦角主要有休止角和内摩擦角,以及壁面摩擦角和运动摩擦角。
    A.正确
    B.错误
    正确答案:————
28.[判断题] 斗式提升机的机型按卸料方式可分为:离心式、重力式、混合式和内卸式。
    A.正确
    B.错误
    正确答案:————
29.[判断题] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan"><span lang="EN-US" style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">Rosin-Rammler</span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">粒度分布方程<span lang="EN-US">   <!--><v:shape   id="图片_x0020_231" o:spid="_x0000_i1096" type="#_x0000_t75" style='width:193.8pt;   height:71.4pt;mso-wrap-style:square;mso-position-horizontal-relative:page;   mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image068.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc06.files/ftkxygc061561.png"/></v:shape><!-->   <!----><img width="258" height="95" v:shapes="图片_x0020_231" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image068.png">   <!----></span>中,<span lang="EN-US">   <!--><v:shape id="图片_x0020_232" o:spid="_x0000_i1097"   type="#_x0000_t75" style='width:42.6pt;height:28.2pt;mso-wrap-style:square;   mso-position-horizontal-relative:page;mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image069.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc06.files/ftkxygc061564.png"/></v:shape><!-->   <!----><img width="57" height="38" v:shapes="图片_x0020_232" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image069.png">   <!----></span>是筛上累积质量百分数。</span><span lang="EN-US" style="font-size:12.0pt;mso-font-kerning:0pt"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
30.[判断题] 斗式提升机的机型按卸料方式可分为:离心式、混合式、内卸式和重力式。
    A.正确
    B.错误
    正确答案:————
31.[判断题] 在降速干燥阶段,主要是物料中物理化学结合水哪一项水分的排除。
    A.正确
    B.错误
    正确答案:————
32.[判断题] <p class="MsoNormal" align="left" style="margin-top:7.8pt;mso-para-margin-top:.5gd;text-align:left;mso-pagination:widow-orphan"><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">若颗粒群符合对数正态分布,则其频度分布函数为<span lang="EN-US">:   <!--><v:shape   id="图片_x0020_58" o:spid="_x0000_i1052" type="#_x0000_t75" style='width:253.8pt;   height:45.6pt;mso-wrap-style:square;mso-position-horizontal-relative:page;   mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image027.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc03.files/ftkxygc031456.png"/></v:shape><!-->   <!----><img width="338" height="61" v:shapes="图片_x0020_58" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image027.png">   <!----></span>,式中,<span lang="EN-US">   <!--><v:shape id="图片_x0020_59" o:spid="_x0000_i1053"   type="#_x0000_t75" style='width:24pt;height:28.2pt;mso-wrap-style:square;   mso-position-horizontal-relative:page;mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image028.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc03.files/ftkxygc031461.png"/></v:shape><!-->   <!----><img width="32" height="38" v:shapes="图片_x0020_59" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image028.png">   <!----></span>称为几何平均径;<span lang="EN-US">   <!--><v:shape id="图片_x0020_60" o:spid="_x0000_i1054"   type="#_x0000_t75" style='width:21pt;height:26.4pt;mso-wrap-style:square;   mso-position-horizontal-relative:page;mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image029.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc03.files/ftkxygc031472.png"/></v:shape><!-->   <!----><img width="28" height="35" v:shapes="图片_x0020_60" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image029.png">   <!----></span>称为几何标准偏差。</span><span lang="EN-US" style="font-size:12.0pt;mso-font-kerning:0pt"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
33.[判断题] 采用静载荷下测定的抗压、抗拉、抗剪和抗弯强度来表示物料的抗破碎阻力,通常,抗压强度最大,抗拉强度次之,抗弯强度较小,抗剪强度最小。
    A.正确    无忧答案网 q1 6 4 7 861640
    B.错误
    正确答案:————
34.[判断题] 助磨剂可明显改善物料在磨机内的分散性与流动状态,从而改善对颗粒的施载条件,以及“软化”颗粒材料的晶格,降低粉碎能耗。
    A.正确
    B.错误
    正确答案:————
35.[判断题] 理想库仑粉体的内聚力较小,通常粒度微细的粉体符合这一规律。
    A.正确
    B.错误
    正确答案:————
36.[判断题] 在非常干燥的空气中,粉体凝聚的主要作用力是范德华力。
    A.正确
    B.错误
    正确答案:————
37.[判断题] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan"><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-bidi-font-family:Microsoft Yahei;color:black;mso-font-kerning:0pt;mso-bidi-language:AR">若已知某一颗粒的实际表面积为<span lang="EN-US">A</span>,与该实际颗粒同体积的球形颗粒表面积为<span lang="EN-US">B</span>,则根据形状指数球形度<span lang="EN-US">   <!--><v:shape   id="图片_x0020_199" o:spid="_x0000_i1080" type="#_x0000_t75" style='width:19.2pt;   height:24pt;mso-wrap-style:square;mso-position-horizontal-relative:page;   mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image054.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc05.files/ftkxygc051515.png"/></v:shape><!-->   <!----><img width="26" height="32" v:shapes="图片_x0020_199" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image054.png">   <!----></span>的定义,<span lang="EN-US">   <!--><v:shape id="图片_x0020_200" o:spid="_x0000_i1081"   type="#_x0000_t75" style='width:32.4pt;height:24pt;mso-wrap-style:square;   mso-position-horizontal-relative:page;mso-position-vertical-relative:page'>   <v:imagedata src="FTGCPD.files/image055.png" o:href="http://wljy.whut.edu.cn/uploadfiles/word/ftkxygc05.files/ftkxygc051520.png"/></v:shape><!-->   <!----><img width="43" height="32" v:shapes="图片_x0020_200" src="http://wljy.whut.edu.cn:80/uploadfiles/word/FTGCPD.files/image055.png">   <!---->B/A</span>。</span><span lang="EN-US" style="font-size:12.0pt;mso-font-kerning:0pt"><o:p></o:p></span>

    A.正确
    B.错误
    正确答案:————
38.[判断题] 在颗粒表面的尖角、弯折、棱边、台阶等几何突变处的表面能(表面活性)要低于其平面处的表面能。
    A.正确
    B.错误
    正确答案:————
39.[单选题] <p class="MsoNormal" style="mso-pagination:widow-orphan"><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">在粉体层最大主应力</span><span lang="EN-US" style="color:windowtext"><span style="position:relative;top:6.0pt;mso-text-raise:-6.0pt">   <v:shape id="_x0000_i1029" type="#_x0000_t75" style="width:13.8pt;   height:18pt" o:ole="">   <v:imagedata src="FTGCDX.files/image005.wmz" o:title="" />    </v:shape></span><!--><xml>   <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1029"    DrawAspect="Content" ObjectID="_1616487362">   </o:OLEObject></xml><!--></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">作用面上,其剪切应力为</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning:0pt"><o:p></o:p></span>

    A.最小
    B.最大
    C.≠0
    D.0
    正确答案:————
40.[单选题]         用于提升粉状、粒状及小块、能自由流动的物料,如煤、水泥、生料、矿渣、石灰石等,宜采用哪一种斗式提升机?
    A.      重力式卸料
    B.      离心式卸料
    C.      混合式卸料
    正确答案:————

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